code: def calculate(self):
      self.result = dict()
      self.result[Result.Mean] = self.calculate_mean()
      self.result[Result.Std] = self.calculate_std()
  
imports: from enum import Enum
  import numpy
  import math
  import scipy.stats
label_desc: Use image node_id 4 for calling the Statistics obj's underlying member method code with example usage: obj.calculate() without return types